Mailing envelope



FIG. 1 is a front perspective view of a mailing envelope showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, of which the left side elevational view is a mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom elevational view thereof; and,

FIG. 7 is a top elevational view thereof. 

The ornamental design for a mailing envelope, as shown and described. 